Annual report pursuant to Section 13 and 15(d)

Cash, Cash Equivalents and Marketable Securities - Summary of Cash, Cash Equivalents and Marketable Securities (Details)

v3.20.1
Cash, Cash Equivalents and Marketable Securities - Summary of Cash, Cash Equivalents and Marketable Securities (Details)
 12 Months Ended
Dec. 31, 2019
USD ($)
Cash and cash equivalents, Amortized Cost $ 22,169,000
Cash and cash equivalents, Unrealized Gain 1,000
Cash and cash equivalents, Unrealized (Loss)
Cash and cash equivalents, Fair Value 22,170,000
Total marketable securities, Amortized Cost 5,607,000
Total marketable securities, Unrealized Gain
Total marketable securities, Unrealized (Loss) (2,000)
Total marketable securities, Fair Value 5,605,000
Total cash, cash equivalents and marketable securities, Amortized Cost 27,776,000
Total cash, cash equivalents and marketable securities, Unrealized Gain 1,000
Total cash, cash equivalents and marketable securities, Unrealized (Loss) (2,000)
Total cash, cash equivalents and marketable securities, Fair Value 27,775,000
U.S. Treasury Bonds [Member]  
Total marketable securities, Amortized Cost 4,003,000
Total marketable securities, Unrealized Gain
Total marketable securities, Unrealized (Loss) (1,000)
Total marketable securities, Fair Value 4,002,000
Corporate Debt Securities [Member]  
Total marketable securities, Amortized Cost 1,604,000
Total marketable securities, Unrealized Gain
Total marketable securities, Unrealized (Loss) (1,000)
Total marketable securities, Fair Value $ 1,603,000